Saved Bookmarks
| 1. |
If A+B+C=180° , then prove that sinA+sinB+sinC = 4 cos(A/2) cos(B/2) cos(C/2) |
|
Answer» If A+B+C=180° , then prove that sinA+sinB+sinC = 4 cos(A/2) cos(B/2) cos(C/2) |
|